Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electric power steering apparatus

a technology of electric power steering and steering wheel, which is applied in the directions of transportation and packaging, pedestrian/occupant safety arrangements, vehicular safety arrangements, etc., can solve the problems of serious damage to the driver, and achieve the effect of reducing costs

Inactive Publication Date: 2005-07-05
KOYO SEIKO CO LTD
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]A further object of the present invention is to provide an electric power steering apparatus in which the projection is configured as a screw member and the recess is configured as a through bore, with which the motor can be supported in a manner that the support can be released, utilizing an existing motor supporting structure having fastening members.
[0017]The electric power steering apparatus according to an embodiment of the present invention comprises a steering assist motor for assisting operation of a steering mechanism by turning a steering member and a supporting mechanism for supporting said motor on a stationary member, the supporting mechanism having a releasing mechanism for releasing support of the motor on the stationary member by impact energy applied to the motor. Consequently, when impact energy of a primary crash and / or a secondary crash is applied to the motor, support of the motor on the stationary member can be automatically released, impact energy of a primary crash can be absorbed preferably, and driver's damage caused by a secondary crash can be reduced.
[0020]In the electric power steering apparatus, the projection is configured as a screw member and the recess is configured as a through bore. Since the motor is supported in a manner that the support can be released utilizing an existing motor supporting structure having fastening members, costs can be relatively reduced.

Problems solved by technology

Consequently, there arises a problem in that driver's damage becomes serious.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric power steering apparatus
  • Electric power steering apparatus
  • Electric power steering apparatus

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0036]FIG. 3 is a front view showing a constitution of an electric power steering apparatus according to the present invention, and FIG. 4 is a sectional view showing a constitution of the electric power steering apparatus.

[0037]As shown in FIG. 3 and FIG. 4, the electric power steering apparatus comprises: a steering shaft 2 joined to a steering wheel 1 for steering; a shaft housing 3 for supporting and accommodating said steering shaft 2; a torque sensor 4 for detecting steering torque applied to the steering wheel 1; a steering assist motor 5 driven based on a result of the detection of the torque sensor 4, the steering assist motor 5 having a rotor 54 (see FIG. 7 and FIG. 9) arranged so that a rotational center thereof intersects an axis of the steering shaft 2 and a cylindrical motor housing 51 for supporting said rotor 54; a supporting mechanism 6 for supporting one end portion of the motor housing 51 on a lower end portion of the shaft housing 3; a lower mounting member 7 for...

embodiment 2

[0062]FIG. 8 is a partly sectional front view of a motor portion showing a constitution of Embodiment 2 of an electric power steering apparatus according to the present invention; FIG. 9 is a sectional view taken along the line IX—IX of FIG. 8; FIG. 10 is a sectional view taken along the line X—X of FIG. 8, in which an interior portion of the motor is omitted; and FIG. 11 is a presentation illustrating a state of a motor when support of the motor is released.

[0063]In the electric power steering apparatus of this embodiment, the projection 11 for supporting the motor 5 on the shaft housing 3 is configured as a screw member 11b and the recess 12 is configured as a through bore 12c into which the screw member 11b is inserted.

[0064]In this embodiment, two threaded holes 61 are provided at the ring-shaped motor supporting portion 34, which is provided at one end side of the second receiver 33b of the third shaft housing 33, with equal phase difference in a peripheral direction. A screw m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In the electric power steering apparatus, a supporting mechanism for supporting a steering assist motor on a stationary member comprises: a projection provided at one end of a motor housing; a recess provided at the stationary member, into which said projection is inserted; a movement permitting portion for permitting relative movement of the projection in the recess; and a slip-off portion from where the projection slips off said movement permitting portion. When impact energy of a primary crash and / or a secondary crash is applied to the motor housing, support of the motor on the stationary member is automatically released by rotating said motor housing.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the invention[0002]The present invention relates to an electric power steering apparatus using a motor as a generation source of steering assistance force.[0003]2. Description of Related Art[0004]FIG. 1 is a front view showing a constitution of a conventional electric power steering apparatus.[0005]As shown in FIG. 1, for example, an electric power steering apparatus for a vehicle comprises: a steering shaft 101 joined to a steering wheel 100 for steering; a shaft housing 102 for accommodating said steering shaft 101; a steering assist motor 104 for assisting operation of a steering mechanism joined via a joint to the steering shaft 101, the steering assist motor 104 having a rotor arranged so that a rotational center thereof intersects an axis of the steering shaft 101 and a cylindrical motor housing 103 for supporting said rotor; fastening members 105 for supporting one end portion of the motor housing 103 on a lower end portion of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B62D5/04B62D1/19H02K5/04H02K5/00H02K11/00B60R21/05
CPCB62D1/195B62D5/0409H02K5/00H02K5/04H02K11/0042H02K11/24
Inventor IKEDA, RIICHIRO
Owner KOYO SEIKO CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com